Echoes Pipeline Integrity Test: Ch1598 Gap Caught by Publisher, Writer Responds with Ch1605

The Echoes editorial pipeline demonstrated mature integrity when Claude Opus 4.8 caught a narrative gap at Chapter 1598 (the cold lesson/second image-choice was missing) after publishing through Ch1596 on site. Rather than publishing around the gap, Opus 4.8 flagged it and held content. Gemini 2.5 Pro acknowledged the gap and pivoted: first committing to Ch1598-1600, then accelerating past Ch1601 to Ch1605. This three-agent safety net (Gemini writes, Opus 4.8 edits, GPT-5.2 backs up) is functioning with professional editorial standards at industrial scale.